So, the next obvious step that I can
do, is to put together the cases.

Step 1 - Check the Pieces

Pull all the pieces for your Pi case
out, lay them on a sheet of white paper.

Step 2 – Remove the Protective
Backing

Thanks to rrascase for including this
extra instruction in the box. Pick a corner and with thumb or finger
nail lift the corner of the protective coat. Repeat the same on the
other side of each piece. Here is where the white piece of paper
comes into play – if you have not removed one side of the
protective coating – the piece will appear blue against the paper.
Otherwise the pieces will all appear to be clear.

Step 3 – Connect the Base and
Audio-Out Side

Before going any further, I have taken the step of getting my ASD wrist band out - putting the case together does require handling of the Raspberry Pi board.

Lay the pieces out. You will notice that one of the longer
side pieces has two round holes – this is the side for the
composite video and audio ports.

Connect this to one of the larger
pieces, via the tongues and grooves. There is no difference between
the top and bottom pieces of the case – but there is a right and
wrong way that they will go. When you piece your bottom/top and long
side pieces together, the top or bottom should not obstruct the
tongue-catches that the shorter sides should slot onto.

Step 4 – Place the Board into
Position

Simple, holding the bottom and audio
side together, place the board on top of the bottom panel so that the
audio and composite ports fit into their holes.

Step 5 – Connect the HDMI-out Side

Holding everything in one hand, bring
the second long side into play, lining up the near-centred hole for
the HDMI-out port.

Step 6 – Slot the Top Into Place

Pick up the remaining large piece,
which will be the top. As you go to place its tongues in to the
grooves on the longer sides, as with the bottom piece, make sure that
it is not going to obstruct the placement of either short side. With
my initial attempt, I did not do this, and I ended up with a top
piece that was out-of-place by about two millimetres – with a gap
to one of the ends, and unable to put the second end panel into
place.

Step 7 – Hook the First End

Take the end piece that has the ports
for the USB and NIC cut out. Align it with the ports on the board,
and slip it over the top tongue-catches from the long-sides. Press
the bottom firmly in, until the bottom holes click in over their
tongue-catches.

Step 8 – Hook the Power End

This end might be the easiest to get
wrong. Neither the SD card slot, nor the micro-USB power socket
protrude from the side of the board, so it would be easy to get this
piece the wrong way around. Make sure that you align the hoel for
the power socket with the power socket, and then hook the piece into
place over the top tongue-catches, then firmly press into place over
the bottom ones.